ACT8740 Product Brief, 03-Feb-08 Advanced Information―All Information Subject to Change Six Channel Integrated Power Management IC for Handheld Portable Equipment FEATURES GENERAL DESCRIPTION • Multiple Patents Pending • Li+ Battery Charger with Integrated MOSFET The patent-pending ACT8740 is a complete, cost effective, highly-efficient ActivePMUTM power management solution that is ideal for a wide range of portable handheld equipment. This device integrates one PWM step-down DC/DC converter, one PWM step-up DC/DC converter with over-voltage protection (OVP), three low dropout linear regulators (LDOs) and a full-featured linear-mode Li+ battery charger into a single, thin, space-saving package. An I2C Serial Interface provides programmability for the DC/DC converters, LDOs and battery charger. REG1 is a fixed-frequency, current-mode PWM step-down DC/DC converter that is optimized for high efficiency and is capable of supplying up to 350mA output current. REG2 is a fixed-frequency, step-up DC/DC converter that safely and efficiently biases a string of up to seven white-LEDs for backlighting. REG3, REG4 and REG5 are low noise, high PSRR linear regulators that are capable of supplying up to 350mA, 250mA and 250mA, respectively. The battery charger incorporates an internal power MOSFET for constantcurrent/constant-voltage, thermally regulated charging of a single-cell Li+ battery. All DC/DC converters and LDOs output voltages are programmable and controllable via the I2C interface. The ACT8740 is available in a tiny 4mm x 4mm 24-pin Thin-QFN package that is just 0.75mm thin. − Programmable Charge Current up to 1A − ON/OFF Control • Five Integrated Regulators − 350mA PWM Step-Down DC/DC − Step-Up DC/DC with OVP for WLED Bias − 350mA Low Noise LDO − 250mA Low Noise LDO − 250mA Low Noise LDO • I2CTM Compatible Serial Interface − Programmable Output Voltages − Configurable Operating Modes • Minimal External Components • 4x4mm, Thin-QFN (TQFN44-24) Package − Only 0.75mm Height − RoHS Compliant APPLICATIONS • Portable Devices and PDAs • Wireless Handhelds • DMB Enabled Devices • GPS Receivers, etc. SYSTEM BLOCK DIAGRAM VIN CHGLEV REG1 Single Cell Li+ Battery Charger Step-Down DC/DC REG2 Step-Up DC/DC nMSTR nIRQ SCL REG3 System Control LDO Battery Programmable Up to 1A OUT1 1.1V to 4.4V Up to 350mA OUT2 WLED Bias OUT3 1.4V to 3.7V Up to 350mA SDA REG4 ON1 LDO ACT8740 ActivePMU Innovative Products. Active Solutions. ActivePMUTM is a trademark of Active-Semi. I2CTM is a trademark of Philips Electronics. REG5 TM LDO -1- OUT4 1.4V to 3.7V Up to 250mA OUT5 1.4V to 3.7V Up to 250mA www.active-semi.com Copyright © 2008 Active-Semi, Inc. ACT8740 Product Brief, 03-Feb-08 PRODUCT OPTIONS Block Function Output Voltage Capability CHGR Battery Charger 4.20V (4.10V to 4.40V available) Programmable up to 1A REG1 Step-Down DC/DC 1.1V to 4.4V 350mA REG2 Step-Up DC/DC Up to 27.5V Up to 7 WLEDs REG3 LDO REG4 LDO REG5 LDO 350mA 1.4V to 3.7V 250mA 250mA : Output voltage options detailed in this table represent standard voltage options, and are available for samples or production orders. Contact Active-Semi for more information regarding semi-custom output voltage combinations. : Contact factory for additional available products or custom requirements. FUNCTIONAL BLOCK DIAGRAM VSYS Active-Semi BODY AND VSYS CONTROL AC Adaptor or USB 4.3V to 6V ACT8740 BAT VIN Li+ Battery + CURRENT SENSE VINUVLO 4.0V VOLTAGE SENSE Charge Control OUT3 CHGLEV PRECONDITION 2.9V THERMAL REGULATION FLOAT 110°C VP1 To Battery SCL SW1 REG1 Serial Interface SDA OUT1 OUT1 GP1 VSYS VINUVLO nMSTR To Battery OUT2 SW2 PUSH BUTTON nIRQ REG2 OVP2 System Control OUT3 FB2 GP2 INL To Battery ON1 LDO REG3 REFBP Reference LDO REG4 GA LDO REG5 Innovative Products. Active Solutions. -2- OUT3 OUT3 OUT4 OUT4 OUT5 OUT5 www.active-semi.com Copyright © 2008 Active-Semi, Inc.